Rules · before the gateway opens3 of 7

Proving a circuit dead

Whenyou are about to touch any conductor on equipment that could be re-energized Doswitch off, apply your own lock and tag, then test the circuit with a meter you have proven on a known live source before and after Standardevery time, by the person doing the work, with no exception for a circuit somebody else has already isolated

Five more rules follow. Roughly five minutes, and the gateway will not open until they are done.

Service call · Kirkfield Processing Plant07:40

WORK ORDER 4471assigned to you

AssetMCC-3 motor control centre, bay 6

ReportedIntermittent trip on the conveyor drive

Site contactR. Okafor, maintenance lead (off site until 14:00)

Your certificationsEnergized work permit: expired 11 days ago

You read the work order at the truck and drive out. The expiry is on the screen for four seconds and is never mentioned again.

Service call · Kirkfield Processing Plant09:15 · decision 2 of 6

09:15 · MCC room, bay 6

The panel is open. A day-shift electrician you have not met is packing up beside it. "I isolated it for you," he says, tapping the breaker. "Locked out at the main. Should be dead. I've got to get to the packing hall, they're down."

He leaves. His lock is on the breaker. Yours is in your bag. The conveyor has been down two hours and the line supervisor has asked twice when it will run.

What do you do?

Start work. The circuit is locked out and a qualified electrician confirmed it is dead. Add your own lock and tag to the breaker, then start work. Add your own lock and tag, prove your meter on a known live source, test the conductor, prove the meter again, then start work. Call R. Okafor and wait for authorization before touching anything.

Pass standard: 12 of 12. A retake routes through the missed rule, then a different call.

REPLACES — legacy screens 3, 4 and exam items 4, 7, 9